Horizontal mills are a type of milling machine that uses a horizontal spindle to cut materials. They are designed to hold and rotate the workpiece while the cutting tool moves horizontally across it. This setup allows for efficient machining of flat surfaces, grooves, and other features, making them ideal for various manufacturing tasks. These machines are commonly used in industries such as automotive, aerospace, and metalworking. Horizontal mills can accommodate larger workpieces compared to vertical mills, providing greater stability and precision during the cutting process. Their versatility makes them valuable tools in both production and prototyping environments.